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    What are the units of molal elevation constant?
    Answer:

    the units of elevation constant is  K kg mol    –1.
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    Why is CaCl2 used to remove snow on roads?

    Answer:

    CaCl2 used to remove snow on the road because
    Addition of CaCl    2 lowers the freezing point of water.
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    Why is boiling point elevated when a non-volatile solute is added?
    Answer:

    When non-volatile solute is added, the vapour pressure of solution is less. Therefore, it is to be heated at higher temperature so that it boils, i.e., boiling point is raised.
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    Why is freezing point depressed when a non-volatile solute is added?
    Answer:

    When non-volatile solute is added to solvent, the vapour pressure of solution becomes less and at a lower temperature, the vapour pressure of solution and solvent in a solid state will become equal, i.e., freezing point is lowered.
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    The observed boiling point of mixture of two volatile liquids is more than that calculated. What type of deviation is noticed?
    Answer:
    when boiling point of mixture of two volatile liquid is more than Negative deviation shown.
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